iPDU Time Synchronization via NTP for Measurement Comparability
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Solution Overview
Problem
Intelligent Power Distribution Units (iPDUs) in data centers face synchronization issues due to measurement skew, leading to inconsistent and non-comparable data, which affects the accuracy of power consumption monitoring and comparison across the network.
Innovation Solution
Implementing a Network Time Protocol (NTP) time server to synchronize the system clocks of iPDUs, ensuring that all units start and end measurements at the same Unix Epoch Time, thereby ensuring consistent and comparable data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If iPDUs collect data independently without centralized time synchronization, then each unit can operate autonomously and collect local measurements, but the measurements from different units become non-comparable due to time skew
Solution Approach 1:
The patent introduces a Network Time Protocol (NTP) time server as an intermediary component that provides centralized time synchronization to all iPDUs in the network. This mediator resolves the time skew issue by having all units reference a common time source, making measurements comparable across the network while maintaining the autonomous operation of individual iPDUs.
2Ease of operation
If iPDUs use local system clocks for timestamping measurements, then each unit operates independently without requiring external synchronization, but measurements taken at the same logical time are actually skewed due to clock differences
Solution Approach 1:
The patent implements a feedback mechanism where iPDUs periodically query the NTP time server to obtain accurate time references. This feedback loop allows each iPDU to adjust its local clock and timestamping based on the centralized time source, ensuring both independent operation and high time accuracy for measurements.
Data Source
AI summary
In an energy management system for a data center, intelligent power distribution units are synchronized by a time server. Measurements carried out by the intelligent power distribution units are commenced and stopped synchronously. Each intelligent power distribution unit carries out a calculation based upon the Unix Epoch Time of receipt of a sampling command from the energy management system.